package com.hll.springcrud.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //登录成功之后，应该有用户的session
        Object loginUser = request.getSession().getAttribute("loginUser");

        if(loginUser==null){//没有登录
            request.setAttribute("msg","没有权限，请先登录");
            request.getRequestDispatcher("/index.html").forward(request,response);//没有登录返回到html页面
            return false;
        }else{
            return true;
        }
    }

}
